期刊
CARBOHYDRATE POLYMERS
卷 179, 期 -, 页码 207-220出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.09.087
关键词
Chitosan; Bacterial cellulose; Epigallocatechin-3-gallate; Active film
资金
- National Natural Science Foundation of China [31771991, 31601497]
- Shaanxi Province Science and Technology Research and Development Project [2015NY022]
- National Center of Meat Quality and Safety Control (Nanjing Agricultural University) [M2015K06, M2016K01]
Films with antioxidant activity were prepared by combining chitosan (CH) and epigallocatechin-3-gallate (EGCG) with nano-bacterial cellulose (BC) as a reinforcement agent. Results showed that BC addition improved the qualities of films jeopardized by EGCG. Fourier Transform Infrared (FTIR) spectroscopy analysis confirmed that there were intermolecular interactions among BC, CH and EGCG though hydrogen bonding. Consequently, BC addition increased the crystallinity and thermal stability of CH-BC5/10-EGCG15/30 films analyzed by X-ray diffraction (XRD) and thermogravimetric (TGA) analysis. BC addition also significantly decreased water solubility (WS), from 26.54% to 20.80%, increased tensile strength (TS), from 18.71 to 44.17 MPa, and increased elongation at break (EAB), from 2.72% to 7.34%. Moreover, BC and EGCG had high affinity for each other, as BC addition lowered the release of EGCG from CH films with a higher ABTS radical scavenging ability. Therefore, BC can be used as a sustained release carrier of EGCG in antioxidant active films.
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